body {
    background-color: #e1e1e1;
}

.book-box {
    width: 1200px;
    margin: 0 auto;
    background-color: #fff;
}

.book-header {
    height: 55px;
    padding-left: 20px;
    border-bottom: 1px #e2e2e2 solid;
}

.book-header h1 {
    line-height: 55px;
    font-size: 26px;
}

.book-tree-box {
    display: inline-block;
    vertical-align: top;
    width: 320px;
    padding-left: 20px;
    margin-top: 4px;
    margin-bottom: 4px;
    border-right: 1px solid #e2e2e2;
    min-height: 600px;
}

.book-tree-link:hover {
    text-decoration: none;
}

.book-tree-link:hover span {
    color: #348eed!important;
}

.book-content-box {
    width: 840px;
    display: inline-block;
    vertical-align: top;
    margin-left: 19px;
    margin-top: 4px;
}

.book-chapter-name {
    font-size: 26px;
    margin-top: 10px;
    margin-bottom: 10px;
}

.book-prev-next {
    padding-top: 20px;
    height: 50px;
    border-bottom: 1px #e2e2e2 solid;
}

.book-prev-next a {
    color: #08c!important;
}

.book-prev {
    float: left;
}

.book-next {
    float: right;
}





